JSON Minifier
Strip whitespace from JSON to shrink payloads.
Private by design. This tool runs entirely in your browser. Your input is processed on your own device and is not uploaded by DO101.
About the JSON Minifier
Remove every unnecessary space and newline from a JSON document and see exactly how much smaller it got. Invalid JSON is reported with the line and column rather than a vague failure.
How to use it
- 1Paste your JSON.
- 2Read the size saving.
- 3Copy or download the minified output.
What you get
- Removes all insignificant whitespace
- Before, after and percentage saved
- Validates as it minifies
- Copy or download as .json
- Runs in your browser
Frequently asked questions
Does minifying change my data?
No. It removes formatting only. Parse the minified output and you get exactly the same values back.
How much will it save?
Pretty-printed JSON is often 20–40% whitespace. Over an API serving many requests, that adds up quickly.
Should I minify JSON I keep in Git?
Usually not — formatted JSON produces readable diffs. Minify what you send over the wire, not what you version.
Keep going
People who use this tool usually reach for these next.
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Check whether JSON is valid and see exactly what broke.
Make text safe inside a JSON string, or turn it back.
Flatten a JSON array into a spreadsheet-ready CSV.